In a way every horror film is religious in that they deal with Biblical concerns like temptation, resurrection (there goes Michael again!) and faith. Yet there's an even more specific set of horror that confronts religious devotion head on. THE EXORCIST is the most famous, but there are tons. This list is by no means conclusive - there's room for plenty of others, but I've tried to make it as good of a sample of the types of religious flicks out there. What's your favorite?